Fuse cartridge



Dec; 4 1923.

J. M. JOHNSON FUSE CARTRIDGE Filed Nov. 6, 1922 l/l wr/vessss 7?.QWgM.

Patented Dec. 4, 1923.

UNITED STATES PATENT OFFICE.

JOHN M. JOHNSON, O1? SIOUX VALLEY TOWNSHIP, UNION COUNTY, SOUTH DAKOTA.

FUSE CARTRIDGE.

Application filed November 6, 1922. Serial No. 599,310.

To all whomit may concern:

Be it known that I, JOHN M. JOHNSON, a citizen of the United States, residing at Sioux Valley Township, in the county of Union and State of South Dakota, have in vented certain new and useful Improve ments in a Fuse Cartridge, of which the following is a specification.

The present invention relates to improvements in fuse cartridges and has for its principal object to provide a cartridge wherein the fusible element may be renewed whenever the same has become burnt out or otherwise mutilated.

A further object of the invention is to generally improve upon fuse cartridges of this nature by providing a device which will be extremely simple and efiicient in construction, reliable in operation, inexpensive to manufacture, and well adapted to the purpose for which it is designed.

With the above and numerous other objects in view, the invention resides in certain novel features of construction, and the combination and arrangement of parts as will be hereinafter more fully described and claimed.

In the drawing Figure 1 is an elevation of the cartridge embodying my invention, one end thereof being shown in section,

Figure 2 is a transverse section taken therethrough on the line 2-2 of Figure 1,

Figure 3 is an end elevation thereof,

Figure 4 is a disassembled perspective of the wedge and plug,

Figure 5 is a perspective of the end memher, and

Figure 6 is a rear elevation of the wedge.

Referring to the drawing in detail it will be seen that a tubular body 1 is formed from some suitable fibrous material and provided with. the end pieces 2. These end pieces 2 consist of the tubular body portions 3 which are closed at their inner end as at 4, said closures being provided with central apertures 5 having diametrically opposed notches 6 communicating therewith. The other end of the tubular body portion 3 is open and threads are provided interiorly thereof extending from the open end. An annular flange 7 extends from the closure 4 a distance from the periphery of the body 3 and extends parallel with, but in an opposite di rection from, the body 3, The flange 7 is received in the ends of the body 1 and is riveted thereto or otherwise attached by the elements 9.

A cone shaped member 10 is provided with a longitudinally central slit 11 having diametrically opposed longitudinally extending grooves 17 and its base end 12 is substantially equal in diameter to the interior diameter of the end member 2 in which it is situated, this base abutting the closure 4. A plug 13 having exterior threads and a cone-shaped seat it at one end is adapted to be screwed in the end members 2 so that the cone shaped member 10 will be received therein and forced against the closure 4. This plug is provided with a groove 15 at its other end for receiving a suitable instrument such as a screw driver. The grooves 17 in the cone shaped member 10 receive the ends of the fusible element '16 which extends from one cone shaped member to the other longitudinally through the fibrous body 1. The lugs 18 which project from the bases 12 of the cone-shaped members are adapted to be received in the notches of the closure 4t and prevent the rotation of the cone-shaped members when the lugs 13 are being rotated for insertion in or removal from the end members.

From the above description taken in connection with the accompanying drawing, the construction, mode of operation and manner of employing my invention will be readily apparent. It will be seen that I have provided a fuse cartridge wherein the fusible element may be readily replaced and wherein component parts may be readily disassembled when it is desired to clean or repair the cartridges. The present modification, however, has merely been given by way of example and it will be readily appreciated that numerous changes may be resorted to in the construction and in the combination and arrangement of parts as fall within the scope of the invention as hereinafter claimed.

Having thus described my invention what I claim as new is A fuse cartridge comprising a tubular body of insulating material, a pair of end members therefor, each end member comprising a tubular body portion having one end thereof closed, said closed end provided with a centrally located aperture communicating with diametrically opposed notches,

a flange extending from the closed end of the end members so as to be received within the ends of the tubular body, means for fastening the flange in engagement with the tubular body, a pair of cone-shaped Ine1nberg one situated in each of the end members with its base adjacent the closed end thereof, said cone-shaped members constructed with a. slit having diametrically opposed longitudinally extending grooves, lugs extending from the bases 01 said coneshaped members for engagement with the notches, and means for holding the coneshziped members firmly within the end members.

In testimony whereof I ai'fix my signature in presence of two witnesses.

JOHN M. JOHNSON. l Vitnesses:

Bnn'rrrii HosoHLER, A. R. BUsWnLL. 

